Ryobi Trimmer 720R Specifications

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The Ryobi 720R is a curved-shaft, gas-powered string trimmer with a modular design that accepts a variety of optional tool heads. The 720R is no longer being manufacturer by Ryobi, as of time of publication, and compared to modern trimmers, the 720R offers a basic feature set. Although the 720R is discontinued, used and refurbished models, along with replacement parts, are available.

Engine

The 720R is equipped with a 31 cc two-cycle engine that runs at a maximum operating speed of 8,300 rpm. Because it's a two-cycle engine, as opposed to a four-cycle engine, it requires an oil-and-gas mixture for fuel instead of pure gasoline. The engine is air cooled and features electronic ignition, a recoil starter, a centrifugal clutch and a 12-ounce fuel tank. The engine transfers its power to the cutting head via a drive shaft housed in the tubular steel shaft.

Dimensions

The 720R weighs 12.5 pounds without fuel but with its cutting head attached. That weight puts it in line with the heaviest of Ryobi's current gas-powered trimmer models, but it's considerably heavier than new models with similar specifications. The 720R's cutting diameter, at 15 inches, also lags behind that of Ryobi's newer trimmers. The 720R uses 0.08-inch-diameter line in a dual-line cutting head that's equipped with a bump-feed line-advance mechanism.

Features

Compared to contemporary trimmers, the 720R is a no-frills tool. Its split drive shaft is equipped with a quick-release coupling that allows for the attachment of optional tool heads, including a leaf blower, cultivator, edger, hedge trimmer, snow blower, straight-shaft string trimmer or tree pruner. The trimmer's standard curved shaft theoretically makes it more balanced and maneuverable, but it also limits the trimmer's reach and puts the trimmer head closer to you, which can make it easier for flung debris to reach your shins.

Current Model

In the 2014 Ryobi trimmer line, the model closest in specifications to the 720R is the CS30. Its engine is of a similar size, but in most other respects it outshines the 720R. The CS30's engine incorporates technology that reduces its emissions, and upgrades to its carburetor make it easier to start. The CS30 has a 17-inch cutting width, which is 2 inches wider than that of the 720R, and its cutting head is equipped with an improved bump-feed mechanism that reduces line jams. At 10.7 pounds, the CS30 is significantly lighter than the 720R.

About the Author

Evan Gillespie grew up working in his family's hardware and home-improvement business and is an experienced gardener. He has been writing on home, garden and design topics since 1996. His work has appeared in the South Bend Tribune, the Fort Wayne Journal-Gazette, Arts Everywhere magazine and many other publications.